fix(factor): 因子任务持久化到 backtest_results.db(type=factor)

此前 FactorReport 无 id,_on_done 不存 DB → 因子任务不进任务列表、重启丢失
(用户:历史任务列表看不到因子分析)。_on_done 现对 FactorReport 调
_persist_factor 存 backtest_stats(type=factor, strategy=因子名, symbol=标的池,
statistics={ic_summary, report_paths})。FactorReport 加 symbols/start/end 字段。

sanguo_factor/analyzer.py

@@ -54,6 +54,9 @@ class FactorReport:
     output_dir: str
     ic_summary: dict = field(default_factory=dict)
     report_paths: dict = field(default_factory=dict)
+    symbols: list[str] = field(default_factory=list)
+    start: str = ""
+    end: str = ""
 
 
 def run_factor_analysis(
@@ -371,5 +374,8 @@ def run_factor_analysis(
         factor_names=factor_names,
         output_dir=output_dir,
         ic_summary=ic_summary,
-        report_paths=report_paths
+        report_paths=report_paths,
+        symbols=symbols,
+        start=start,
+        end=end,
     )

sanguo_orchestrator/runner.py

@@ -144,8 +144,30 @@ class Orchestrator:
         # load_result(result.id). FactorReport (no .id) falls back to None until S2.
         task.complete(result_id=getattr(result, "id", None))
         task.raw_result = result  # S2: keep in-memory result (FactorReport) for ic-summary/report
+        # S2: persist factor result so it appears in task list & survives restart
+        if getattr(result, "ic_summary", None) and getattr(result, "factor_names", None) is not None:
+            self._persist_factor(task_id, result)
         await self._notify_stage(task_id, "完成")
 
+    def _persist_factor(self, task_id: str, fr) -> None:
+        """Persist FactorReport to backtest_results.db (type=factor) so it shows
+        in task list and survives API restart. Mirrors cta/optimize persistence."""
+        from sanguo_backtest.result_store import save_result, BacktestResult
+        try:
+            save_result(BacktestResult(
+                task_id=task_id, type="factor", status="done",
+                strategy=",".join(fr.factor_names),
+                symbol=",".join(getattr(fr, "symbols", []) or []),
+                params={"factor_names": fr.factor_names},
+                start=getattr(fr, "start", "") or "",
+                end=getattr(fr, "end", "") or "",
+                statistics={"ic_summary": fr.ic_summary, "report_paths": fr.report_paths},
+                equity_curve=None, trades=None,
+            ), db_path=self.db_path)
+        except Exception as e:
+            import logging
+            logging.getLogger(__name__).warning("persist factor %s failed: %s", task_id, e)
+
     def get_status(self, task_id: str) -> TaskState | None:
         """Get task status by ID"""
         return self.pool.get_status(task_id)